@ colande I borrowed a friends bike tool kit. It had a standard chain tool so I used that. I removed the damaged link and re connected the chain. My worry is that this repair only serves to weaken the chain in addition to any effects of using a shorter chain.
@ DT78 It’s a full sus. 1 day old Orange 5s. I’ve been riding a Giant trance x4 09 for a while without issue and before that 10 years on hardtails. It’s interesting that vpp suspension design can suffer something like a 2.5cm, chain growth. If this is the case it sounds like a shorter chain could be under more stress?
Taking into account the replies from DT78 and colande it might be a better idea to invest in a decent chain that I can still use with the existing cassette…given I’ve done just a few miles on it.
Thank you for your advice.